Air filtering device with impurity anti-blocking cleaning structure

Abstract

The invention discloses an air filtering device with an impurity anti-blocking cleaning structure, and relates to the technical field of air filtering, the air filtering device comprises a filtering box, a sealing door and air inlets, one side of the filtering box is rotatably connected with the sealing door, and the air inlets are symmetrically formed in one side of the filtering box. The height of the side, abutting against the pressing ring, of the tilting rod is increased, the height of the sliding frame located in the limiting frame is reduced, the brush cylinder on the sliding frame makes contact with the surface of the filter cylinder, automatic brushing in the rotating process of the filter cylinder is achieved, brushed impurities are pumped away from the filter box in a unified mode through the sewage discharging air pump, and meanwhile the surface of the filter cylinder is automatically cleaned by adjusting the rotating speed of the motor. And the subsequent rotation speed of the motor is increased, so that the brush cylinder is separated from the surface of the filter cylinder, and the whole service life of the brush cylinder is prevented from being influenced by long-time contact with the filter cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of air filtration, and specifically to an air filtration device with an impurity anti-blocking and cleaning structure. Background Art

[0002] An air filter refers to an air filtration device, which is generally used in clean workshops, clean factories, laboratories and clean rooms, or in dust-proof scenarios such as electronic machinery and communication equipment. There are five types of primary filters, medium-efficiency filters, high-medium-efficiency filters, sub-high-efficiency filters and high-efficiency filters. Each type has different standards and usage efficiencies.

[0003] Dust particles in the air move by inertial motion, random Brownian motion or under the action of a certain field force with the air flow. When the particles move and hit other objects, the van der Waals force existing between the objects causes the particles to stick to the fiber surface. Dust entering the filter medium has more opportunities to hit the medium, and will be stuck when hitting the medium. Smaller dust particles will collide with each other and agglomerate to form larger particles and settle. According to the patent document with the publication number CN118391775A, through the setting of structures such as a secondary rotating shaft and a rotating rod, when the motor starts, the main rotating shaft rotates, the main rotating shaft drives the fan blades to rotate, so that air flows in from the air inlet pipe, and the filter screen filters out the impurity components contained in the air. At the same time, the driving bevel gear drives the driven bevel gear to rotate, so that the secondary rotating shaft rotates to drive the rotating rod to rotate. While the driven shaft rotates, it rotates under the action of the rack in the toothed disc, so as to rotate the cleaning brush to clean the filter screen and improve the quality of air filtration. However, considering that the cleaning brush continuously contacts the filter screen, the wear between the two is serious, the service life of the cleaning brush is reduced, and at the same time, it is required that the filtration device can intercept various substances in the air.

[0004] Therefore, we propose an air filtration device with an impurity anti-blocking and cleaning structure. Summary of the Invention

[0005] The purpose of the present invention is to provide an air filtration device with an impurity anti-blocking and cleaning structure to solve the technical defects proposed in the background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An air filtration device with an impurity anti-blocking and cleaning structure, including a filtration box, a sealing door and an air inlet. One side of the filtration box is rotatably connected with a sealing door, and the air inlet is symmetrically arranged on one side of the filtration box. The bottom inner wall of the filtration box is fixed with a transmission box by bolts. Inside the filtration box and on top of the transmission box, a first plate frame is evenly installed, and the first plate frame is slidably connected to the inner wall of the transmission box. A polyester fiber filter element plate is placed and fixed inside the first plate frame.

[0007] A blower is fixed by bolts inside the filter box and on top of the polyester fiber filter plate. Plate frames II are evenly installed on the top of the blower. The plate frames II are slidably connected to the inner wall of the filter box. A honeycomb activated carbon filter plate is fixedly placed inside the inner wall of the plate frames II. Air outlet holes are evenly formed in the filter box and on top of the honeycomb activated carbon filter plate.

[0008] Furthermore, motors are symmetrically fixed to the inner wall of the transmission box by bolts. Fixed rings are symmetrically fixed to the top of the transmission box. A linkage exhaust mechanism is installed inside the fixed rings.

[0009] Furthermore, the linkage exhaust mechanism includes a filter cylinder, a rotating shaft, and a sliding sleeve. The output end of the motor is fixed to the filter cylinder by spot welding. The rotating shaft is fixed to the top of the filter cylinder by spot welding. The outer wall of the rotating shaft is symmetrically rotatably connected to swing arms by bearings. A sliding sleeve is sleeved and slidably connected to the outer wall of the rotating shaft and on top of the swing arms. A connecting rod is rotatably connected to the outer wall of the sliding sleeve and is movably connected to the swing arm. One side of the swing arm is movably connected to a pendulum arm.

[0010] Furthermore, the linkage exhaust mechanism further includes a pressing ring. One side of the sliding sleeve penetrates through the fixed ring and is fixed to the pressing ring by spot welding. A spring is sleeved and installed on the outer wall of the sliding sleeve and at the bottom of the pressing ring.

[0011] Furthermore, a limiting frame is fixedly connected to the inner wall of the transmission box. Limiting grooves are symmetrically formed on both sides of the limiting frame. A sliding frame is slidably connected inside the limiting frame. The protrusions on both sides of the outer wall of the sliding frame are engaged with the limiting grooves.

[0012] Furthermore, brush cylinders are movably connected to the inner walls on both sides of the sliding frame. One end of a rocker lever is rotatably connected to the top of the fixed ring by a bearing. One end of the rocker lever abuts against the bottom of the pressing ring. The other end of the rocker lever is slidably engaged with the protrusion on the top of the sliding frame.

[0013] Furthermore, a sewage air pump is fixed by bolts inside the filter box and on top of the transmission box. The air inlet end of the sewage air pump is communicated with the transmission box through a pipeline. The air outlet end of the sewage air pump is communicated with the filter box through a pipeline. An ultraviolet lamp is installed inside the filter box and on top of the transmission box.

[0014] The present invention also provides a working method for the air filtering device with an impurity anti-blocking and cleaning structure, and the specific method is as follows:

[0015] High-speed exhaust filtration: The rotation of the motor drives the rotation of the filter cylinder and the rotating shaft inside the filter cylinder. The centrifugal force generated by the rotation of the rotating shaft drives the pendulum arm to unfold. The rotation of the pendulum arm generates an upward flowing air current. The air current outside the filter box enters the filter cylinder through the air inlet, and the filter cylinder completes the preliminary filtration of the air.

[0016] The rising airflow passes through the UV lamp sterilizer and reaches the polyester fiber filter plate on the plate frame 1, intercepts tiny impurities in the air, and is blown to the honeycomb activated carbon filter plate on the plate frame 2 through the fan rotation, and then discharged from the air outlet on the top of the filter box;

[0017] Low speed suction and impurities removal, the motor speed is reduced, the swing arm rotates and lifts slightly, and at the same time pulls the sliding sleeve upward, the pressure plate moves upward to cause the tilting rod to swing, and the other side of the tilting rod drops to make the slide in the limit frame move obliquely downward, causing the brush cylinder in the slide to contact the filter cartridge, completing the cleaning of impurities on the filter cartridge surface, and at the same time start the sewage air pump on the top of the transmission box to extract the impurities brushed off the filter cartridge surface.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The motor in the transmission box drives the filter cartridge and the rotating shaft to rotate. The rotating arm and the swing arm on the rotating shaft are unfolded to generate an upward airflow, causing the air outside the filter box to pass through the air inlet and the filter cartridge to complete the preliminary impurity filtration. As the filter cartridge works for a long time, the amount of impurities adhering to the surface of the filter cartridge increases, affecting the normal air intake of the filter box. At this time, the adjustment is made under the original motor speed, and the motor speed is actively reduced to reduce the floating height of the swing arm. Relatively speaking, the height of the sliding sleeve on the rotating shaft rises, the pressure ring on the fixing ring rises, resulting in the lifting of the height of the tilting rod abutting the pressure ring side, the height of the slide frame in the limit frame is reduced, and the brush drum on the slide frame contacts the surface of the filter cartridge to realize automatic brushing during the rotation of the filter cartridge, and the impurities brushed off are uniformly extracted from the filter box by the sewage air pump, and the surface of the filter cartridge is automatically cleaned by adjusting the motor speed. The subsequent increase in the motor speed causes the brush drum to be separated from the abutment against the surface of the filter cartridge, so as to avoid affecting the overall service life of the brush drum due to long-term contact with the filter cartridge.

[0020] 2. In the present invention, by installing filter cartridges, ultraviolet lamps, polyester fiber filter core plates and honeycomb activated carbon filter core plates correspondingly from bottom to top in the filter box, impurities and bacteria in the air are intercepted and removed respectively to ensure complete air purification. At the same time, pull-out plate frame 1 and plate frame 2 are arranged in the filter box to facilitate quick replacement of the honeycomb activated carbon filter core plate and the polyester fiber filter core plate, making the air filter device with an impurity anti-blocking and cleaning structure more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the expanded structure of the plate frame 1 and the plate frame 2 in the filter box of the present invention;

[0022] Figure 2 It is a schematic diagram of the air filter device sealing door with impurity blocking and cleaning structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the main cross-sectional structure of the filter box of the present invention;

[0024] Figure 4 Schematic diagram of the connection structure between the linkage exhaust mechanism and the limit frame in the transmission box of the present invention;

[0025] Figure 5 Schematic diagram of the overall structure of the linkage exhaust mechanism of the present invention;

[0026] Figure 6 Schematic diagram of the installation structure of the sliding frame in the limit frame of the present invention.

[0027] In the figure: 1. Filter box; 2. Sealing door; 3. Transmission box; 4. First plate frame; 5. Polyester fiber filter element plate; 6. Fan; 7. Second plate frame; 8. Honeycomb activated carbon filter element plate; 9. Air outlet hole; 10. Fixed ring; 11. Motor; 12. Linkage exhaust mechanism; 121. Filter cartridge; 122. Rotating shaft; 123. Rotating arm; 124. Sliding sleeve; 125. Pressure ring; 126. Swing arm; 13. Spring; 14. Limit frame; 15. Limit groove; 16. Sliding frame; 17. Brush barrel; 18. Lever; 19. Sewage air pump; 20. Ultraviolet lamp; 21. Air inlet. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1-6 , the present invention provides a technical solution:

[0030] Embodiment 1: Considering the cleaning of the surface of the filter screen on the air filtration device, the commonly used method is to disassemble and clean it. Therefore, as Figure 2 shown, linkage exhaust mechanisms 12 are symmetrically arranged on the transmission box 3 installed at the bottom of the filter box 1. Through the rotation of the filter cartridge 121 and the rotating shaft 122, the self-priming air intake of the filter box 1 is completed. At the same time, by changing the rotation speed of the motor 11, the surface of the filter cartridge 121 is automatically cleaned synchronously, avoiding the problem of reduced gas flow rate caused by the blockage of the mesh holes by impurities during the long-term operation of the filter cartridge 121;

[0031] Specifically, as Figure 4 and Figure 5 shown, motors 11 are symmetrically installed in the transmission box 3. The motors 11 drive the filter cartridge 121 and the rotating shaft 122 on the filter cartridge 121 to rotate. At the same time, the top of the filter cartridge 121 abuts against the fixed ring 10 fixedly arranged on the transmission box 3 to ensure the stable rotation of the filter cartridge 121;

[0032] The motor 11 drives the filter cartridge 121 to rotate at the side of the transmission box 3 and at the air inlet 21 of the filter box 1. The rotating arm 123 on the outer wall of the rotating shaft 122 rotates, and the swing arm 126 movably connected to the rotating arm 123 unfolds. A counterweight ball is arranged at the front end of the swing arm 126. At the same time, due to the special fan blade shape of the swing arm 126, an upward air flow can be generated when it rotates and unfolds. At the same time, as the rotating arm 123 and the swing arm 126 unfold, the height of the connection point between the two decreases. Relatively, one side of the sliding sleeve 124 sleeved and slidably connected on the rotating shaft 122 is movably connected to the rotating arm 123, so that the sliding sleeve 124 moves downward synchronously when the swing arm 126 unfolds;

[0033] One side of the rotating sleeve is sleeved and fixed with a pressure ring 125 outside the fixed ring 10. A spring 13 is also sleeved and fixed between the pressure ring 125 and the fixed ring 10. The spring 13 abuts against the pressure ring 125. The higher the rotation speed of the motor 11, the greater the downward distance of the sliding sleeve 124 on the rotating shaft 122. A rocker 18 is rotatably connected to the fixed ring 10. One end of the rocker 18 abuts against the bottom of the pressure ring 125. When the pressure ring 125 moves downward, the rocker 18 is synchronously pressed downward, making the right side of the rocker 18 lower and the left side higher;

[0034] As Figure 4 shown, a limit frame 14 is also fixed inside the transmission box 3. Limit slots 15 are symmetrically opened on both sides of the limit frame 14. At the same time, as Figure 6 shown, a sliding frame 16 is slidably connected inside the limit frame 14. The protrusions on both sides of the sliding frame 16 abut against the limit slots 15. When the rocker 18 maintains a lower right and higher left position, the left side of the rocker 18 lifts and pulls the sliding frame 16 inside the limit frame 14 upward. The inclined surface of the limit slot 15 causes the sliding frame 16 to slide synchronously upward and leftward. The brush barrel 17 movably arranged inside the sliding frame 16 disengages from the surface of the filter cartridge 121. At this time, the motor 11 rotates at a high speed, driving the swing arm 126 to unfold for air supply work. As the filtering time of the filter cartridge 121 increases, the amount of impurities intercepted on its surface increases, and then the cleaning work of the filter cartridge 121 is carried out;

[0035] When the rotation speed of the motor 11 decreases, the spring 13 pushes the pressure ring 125 upward to move. At the same time, the rotation and lifting angle of the swing arm 126 decreases. At this time, the rocker 18 changes from the original higher left and lower right to lower left and higher right. When there is no lifting of the rocker 18, the sliding frame 16 inside the limit frame 14 moves obliquely downward. The brush barrel 17 inside the sliding frame 16 begins to contact the surface of the filter cartridge 121. The slowly rotating filter cartridge 121 contacts the brush barrel 17, and the brush barrel 17 completes the cleaning of the surface of the filter cartridge 121. At the same time, the impurities adsorbed on the brush barrel 17 will also be intercepted by the comb-shaped grooves on the side of the sliding frame 16, so as to discharge the impurities on the filter cartridge 121 into the transmission box 3;

[0036] The surface of the filter cartridge 121 is cleaned by reducing the rotation speed of the motor 11. Since the rotation speed of the motor 11 is reduced, the rotation amplitude of the swing arm 126 is reduced, and the generated upward air flow rate is reduced. Thus, the impurities brushed off by the brush cylinder 17 are prevented from being adsorbed on the surface of the filter cartridge 121 again, causing secondary pollution of the filter cartridge 121. At the same time, the cleaning efficiency of the impurities on the filter cartridge 121 is accelerated. At the same time, the brush cylinder 17 is in indirect contact with the filter cartridge 121. Compared with continuous contact, the bristles on the surface of the brush cylinder 17 are severely worn, and the service life is greatly shortened. The rotating cleaning of the filter cartridge 121, compared with the fixed setting of the filter cartridge 121, the centrifugal force generated by the daily rotation of the filter cartridge 121 will also throw out the impurities, realizing self-cleaning during the operation of the filter cartridge 121;

[0037] Considering that the amount of impurities in the transmission box 3 is continuously increasing, as Figure 2 shown, a sewage discharge air pump 19 is fixedly installed at the top of the transmission box 3 through bolts. Among them, the air inlet end of the sewage discharge air pump 19 is communicated with the transmission box 3. By the operation of the sewage discharge air pump 19, the impurities in the transmission box 3 are continuously transferred to ensure that the filter cartridge 121 works in a clean environment.

[0038] Embodiment 2: Considering that the filtering conditions of the filter cartridge 121 are limited, other tiny impurities in the air will still pass through the filter cartridge 121 to the middle of the filter box 1, as Figure 2 shown, a first plate frame 4 is uniformly installed in the filter box 1 and at the top of the transmission box 3. The drawer-type design of the first plate frame 4 facilitates subsequent operators to open the sealing door 2 on the filter box 1 to replace the polyester fiber filter element plate 5. The second plate frame 7 is the same as the first plate frame 4 and can both be pulled out;

[0039] As Figure 1 shown, the multi-stage installation of the polyester fiber filter element plate 5 in the first plate frame 4 intercepts tiny impurities in the air. At the same time, the ultraviolet lamps 20 installed in the filter box 1 at the bottom of the polyester fiber filter element plate 5 can treat the germs in the air to ensure complete air purification;

[0040] To accelerate the air flow in the upper section of the filter box 1, a blower 6 is arranged in the filter box 1 and at the top of the polyester fiber filter element plate 5. The rotation of the blower 6 is used to mobilize the air filtered by the polyester fiber filter element plate 5 to accelerate the circulation rate of the purified air in the upper section of the filter box 1. There are multiple second plate frames 7 arranged at the top of the blower 6. A honeycomb activated carbon filter element plate 8 is installed and fixed in the second plate frame 7. The honeycomb activated carbon has the characteristics of large specific surface area, small through-hole resistance, developed micropores, high adsorption capacity and long service life, and can remove acid-base gases such as nitrogen oxides, carbon tetrachloride, chlorine, benzene, dimethylformamide, acetone, ethanol, ether, methanol, acetic acid, ethyl acetate, styrene, phosgene and malodorous gases in the air, further improving the air purification effect;

[0041] The air finally discharged from the honeycomb activated carbon filter element plate 8 in the filter box 1 completes the final filtration work and is discharged through the air outlet hole 9 on the filter box 1. By setting the first frame 4 and the second frame 7, it is convenient to replace the relevant polyester fiber filter element plate 5 and honeycomb activated carbon filter element plate 8 in the filter box 1. At the same time, the installation of the honeycomb activated carbon filter element plate 8 and the polyester fiber filter element plate 5 expands the treatment range of the air filtration device with an impurity anti-blocking and cleaning structure, further improving the air purification effect.

[0042] The working principle of the present invention: The rotation of the motor 11 drives the rotation of the filter cylinder 121 and the rotating shaft 122 inside the filter cylinder 121. The centrifugal force generated by the rotation of the rotating shaft 122 drives the swing arm 126 to unfold. The rotation of the swing arm 126 generates an upward flowing air current. The air current outside the filter box 1 enters the filter cylinder 121 through the air inlet 21, and the filter cylinder 121 completes the preliminary filtration of the air.

[0043] The upward flowing air current passes through the ultraviolet lamp 20 for sterilization and reaches the polyester fiber filter element plate 5 on the first frame 4, intercepting tiny impurities in the air, and is blown by the rotation of the fan 6 towards the honeycomb activated carbon filter element plate 8 on the second frame 7, and then is discharged through the air outlet hole 9 at the top of the filter box 1.

[0044] When the rotational speed of the motor 11 decreases, the lifting amplitude of the swing arm 126 is small. At the same time, the sliding sleeve 124 is pulled upward, and the pressing plate moves upward, causing the rocker 18 to swing. The other side of the rocker 18 descends, causing the sliding frame 16 in the limiting frame 14 to move obliquely downward, resulting in the brush cylinder 17 in the sliding frame 16 contacting the filter cylinder 121. Along with the rotation of the filter cylinder 121 and the contact of the brush cylinder 17, the impurities on the surface of the filter cylinder 121 are cleaned. At the same time, the sewage air pump 19 at the top of the transmission box 3 is started to extract the impurities brushed off the surface of the filter cylinder 121.

[0045] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

[0046] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An air filter device with an impurity blocking and cleaning structure, comprising a filter box (1), a sealing door (2) and an air inlet (21), wherein one side of the filter box (1) is rotatably connected to the sealing door (2), and one side of the filter box (1) is symmetrically provided with an air inlet (21), characterized in that: The bottom inner wall of the filter box (1) is fixed with a transmission box (3) by bolts, a plate frame (4) is evenly installed in the filter box (1) and on the top of the transmission box (3), and the plate frame (4) is slidably connected to the inner wall of the transmission box (3), and a polyester fiber filter element plate (5) is placed and fixed in the plate frame (4); A fan (6) is fixed by bolts in the filter box (1) and located on the top of the polyester fiber filter plate (5); a plate frame 2 (7) is evenly installed on the top of the fan (6); the plate frame 2 (7) is slidably connected to the inner wall of the filter box (1); a honeycomb activated carbon filter plate (8) is fixedly placed on the inner wall of the plate frame 2 (7); and air outlet holes (9) are evenly opened on the filter box (1) and located on the top of the honeycomb activated carbon filter plate (8).

2. The air filter device with impurity anti-blocking and cleaning structure according to claim 1 is characterized in that: A motor (11) is symmetrically fixed to the inner wall of the transmission box (3) by means of bolts, a fixing ring (10) is symmetrically fixed to the top of the transmission box (3), and a linkage exhaust mechanism (12) is installed in the fixing ring (10).

3. The air filter device with impurity blocking prevention and cleaning structure according to claim 2 is characterized in that: The linked exhaust mechanism (12) comprises a filter cartridge (121), a rotating shaft (122) and a sliding sleeve (124); the filter cartridge (121) is fixed to the output end of the motor (11) by spot welding; the rotating shaft (122) is fixed to the top of the filter cartridge (121) by spot welding; the outer wall of the rotating shaft (122) is symmetrically rotatably connected to a rotating arm (123) via a bearing; the outer wall of the rotating shaft (122) is sleeved and slidably connected to the top of the rotating arm (123); the outer wall of the sliding sleeve (124) is movably connected to the rotating arm (123) by a rotating connecting rod; and a swing arm (126) is movably connected to one side of the rotating arm (123).

4. The air filter device with impurity blocking prevention and cleaning structure according to claim 3 is characterized in that: The linked exhaust mechanism (12) further comprises a pressure ring (125); one side of the sliding sleeve (124) passes through the fixing ring (10) and is fixed to the pressure ring (125) by spot welding; a spring (13) is sleeved and mounted on the outer wall of the sliding sleeve (124) and at the bottom of the pressure ring (125).

5. The air filter device with impurity blocking prevention and cleaning structure according to claim 4 is characterized in that: The inner wall of the transmission box (3) is fixedly connected to a limit frame (14), and limit grooves (15) are symmetrically provided on both sides of the limit frame (14). A slide frame (16) is slidably connected inside the limit frame (14), and protrusions on the outer walls of both sides of the slide frame (16) are engaged with the limit grooves (15).

6. The air filter device with impurity blocking prevention and cleaning structure according to claim 5 is characterized in that: The inner walls of both sides of the slide (16) are movably connected with brush cylinders (17), and the top of the fixed ring (10) is rotatably connected with a tilting rod (18) via a bearing, one end of the tilting rod (18) is in contact with the bottom of the pressure ring (125), and the other end of the tilting rod (18) is slidably engaged with a protrusion on the top of the slide (16).

7. The air filter device with impurity blocking prevention and cleaning structure according to claim 1, characterized in that: A sewage air pump (19) is fixed by bolts in the filter box (1) and located on the top of the transmission box (3); an air inlet end of the sewage air pump (19) is connected to the transmission box (3) through a pipeline; an air outlet end of the sewage air pump (19) is connected to the filter box (1) through a pipeline; and an ultraviolet lamp (20) is installed in the filter box (1) and located on the top of the transmission box (3).

8. The working method of the air filter device with impurity anti-blocking and cleaning structure according to any one of claims 1 to 7, characterized in that: The specific method is as follows: High-speed exhaust filtration utilizes the rotation of the motor (11) to drive the filter cartridge (121) and the rotating shaft (122) inside the filter cartridge (121) to rotate, the centrifugal force generated by the rotation of the rotating shaft (122) drives the swing arm (126) to expand, the swing arm (126) rotates to generate an upward airflow, and the airflow outside the filter box (1) enters the filter cartridge (121) through the air inlet (21), completing the preliminary filtration of the air by the filter cartridge (121); The rising airflow passes through the ultraviolet lamp (20) for sterilization and reaches the polyester fiber filter plate (5) on the plate frame one (4), intercepts tiny impurities in the air, and is rotated by the fan (6) and blown to the honeycomb activated carbon filter plate (8) on the plate frame two (7), and then discharged from the air outlet (9) at the top of the filter box (1); The impurities are sucked and removed at a low speed. The speed of the motor (11) is reduced, and the swing arm (126) rotates and lifts with a small amplitude, and at the same time, the sliding sleeve (124) is pulled upward, and the pressure plate moves upward to cause the tilting rod (18) to swing. The other side of the tilting rod (18) descends, causing the inner slide frame (16) of the limit frame (14) to move obliquely downward, causing the brush cylinder (17) in the slide frame (16) to contact the filter cartridge (121), completing the cleaning of impurities on the surface of the filter cartridge (121). At the same time, the sewage discharge air pump (19) on the top of the transmission box (3) is started to extract the impurities brushed off the surface of the filter cartridge (121).

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